Passenger vehicle wheel rim

Abstract

The present application belongs to the field of motor vehicle parts, and particularly relates to a passenger vehicle wheel rim, which comprises, in sequence, an outer rim flange, an outer side bead seat, an outer side bead peak, a wheel rim middle section, an inner side bead peak, an inner side bead seat and an inner rim flange; the wheel rim middle section is located between the outer side bead peak and the inner side bead peak, and is two-section, three-section or four-section; compared with the feature of the traditional wheel rim that the radius gradually expands in one direction from the outer rim flange side to the inner rim flange side, the radius of the wheel rim middle section gradually expands at both ends of the minimum radius. The three configurations provided by the present application reduce the weight of the wheel, greatly improve the free modal of the first-order wheel rim, and significantly reduce the radial impact deformation of the inner rim flange.

Description

Technical Field

[0001] This invention belongs to the field of motor vehicle parts, and specifically relates to a passenger car wheel rim. Background Technology

[0002] As a core component of the wheel, the wheel rim is a key load-bearing structure of the vehicle's running system. It bears the core functions of transmitting loads and adapting to the tires, and its structural design directly affects the vehicle's handling stability and ride comfort.

[0003] The new energy vehicle industry is booming, exhibiting two key trends: First, the demand for lightweighting is becoming increasingly urgent—due to the increased weight of battery packs leading to a more than 15% increase in overall vehicle curb weight, lightweighting has become a core path to reduce energy consumption and improve range; second, wheels are developing towards larger diameters and wider rims, with rims larger than 19 inches accounting for over 67% of mid-to-high-end new energy vehicles, and 22-inch rims gradually becoming more common. However, the increase in wheel diameter and rim width has brought prominent problems: it not only directly leads to an increase in unsprung mass, exacerbating the energy consumption burden of the vehicle, but also significantly increases the difficulty of optimizing wheel NVH (noise, vibration, and harshness) performance.

[0004] Looking further, the rim accounts for over 50% of the overall wheel mass, and this percentage increases with the wheel diameter. Crucially, as a core unsprung component, the wheel offers significant weight reduction benefits—every 1kg reduction is equivalent to increasing the range of a new energy vehicle by 5 kilometers.

[0005] Therefore, traditional wheel rim structures can no longer meet the multiple requirements of large size, high strength, lightweight and high NVH performance. There is an urgent need to invent a new type of wheel rim structure that can adapt to the development trend of large wheel diameter and wide rim while achieving weight reduction and energy saving and NVH performance optimization, so as to help new energy vehicles break through the bottlenecks of range and comfort. Summary of the Invention

[0006] This invention proposes a passenger car wheel rim to solve the problem that traditional wheel rim structures in the prior art cannot simultaneously achieve large size, high strength, lightweight and high NVH performance.

[0007] To achieve the above objectives, the present invention proposes the following technical solution: A passenger car wheel rim includes an outer rim flange, an outer bead seat, an outer bead peak, a rim middle section, an inner bead peak, an inner bead seat, and an inner rim flange connected in sequence; the rim middle section is a two-section, three-section, or four-section rim, and the radius of the two ends of the rim middle section gradually expands at the point where the radius is the smallest. When the middle section of the rim is a two-section type, it includes a first section and a second section. The outer circular peak, the first section, the second section and the inner circular peak are connected in sequence, and the connection point between the first section and the second section is the point with the smallest radius. When the middle section of the rim is three-section, it includes a first section, a second section, and a third section. The outer circular peak, the first section, the second section, the third section, and the inner circular peak are connected in sequence, and the connection between the first section and the second section is the point with the smallest radius. When the middle section of the rim is four-segment, it includes a first segment, a second segment, a third segment, and a fourth segment. The outer circular peak, the first segment, the second segment, the third segment, the fourth segment, and the inner circular peak are connected in sequence, and the connection between the second segment and the third segment is the point with the smallest radius.

[0008] Preferably, when the middle section of the rim is two-segmented, the angle between the first segment and the horizontal direction clockwise is θ1, 0°<θ1<90°; the angle between the first segment and the second segment is θ2, θ2≠180°; the angle between the second segment and the horizontal direction counterclockwise is θ3, 0°<θ3≤90°; θ1+θ2+θ3=180°.

[0009] Preferably, θ1=14.39°, θ2=118.15°, and θ3=47.56°.

[0010] Preferably, when the middle section of the rim is three-segmented, the angle between the first segment and the horizontal direction clockwise is α1, 0°≤α1<90°; the angle between the first segment and the second segment is α2, α2≠180°; the angle between the second segment and the third segment is α3, α3≠180°; the angle between the third segment and the horizontal direction counterclockwise is α4, 0°≤α4≤90°; α1+α2+α3+α4=360°.

[0011] Preferably, α1=14.29°, α2=148.05°, α3=121.81°, and α4=75.85°.

[0012] Preferably, when the middle section of the rim is four-segmented, the angle between the first segment and the horizontal direction clockwise is β1, 0°≤β1<90°; the angle between the second and third segments is β2, β2≠180°; the angle between the second and third segments is β3, β3≠180°; the angle between the third and fourth segments is β4, β4≠180°; the angle between the fourth segment and the horizontal direction counterclockwise is β5, 0°≤β5≤90°, and β1+β2+β3+β4+β5=540°.

[0013] Preferably, β1=13°, β2=177°, β3=149.34°, β4=123.81°, and β5=76.85°.

[0014] The advantages of this invention are: This invention proposes a multi-segment structure for the middle section of the wheel rim, including two-segment, three-segment, and four-segment structures. The wheel rim radius first contracts and then expands in a bidirectional drafting process, which can reduce the weight of the wheel rim, improve the radial deformation resistance of the wheel rim, and improve the wheel rim modality. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A three-dimensional view of a passenger car wheel rim; Figure 2 This is a cross-sectional view of the structure of Example 1; Figure 3 This is a cross-sectional view of the structure in Example 2; Figure 4 This is a cross-sectional view of the structure in Example 3; Figure 5 This is a cross-sectional view of the structure in Example 4; Figure 6 This is a cross-sectional view of the structure in Example 5; Figure 7 This is a cross-sectional view of a preferred embodiment of the present invention, showing the wheel axle. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0017] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0018] Please see Figure 1 As shown, the present invention provides a passenger car wheel rim, the rim structure including an outer rim 1, an outer bead seat 2, an outer round peak 3, a rim middle section 7, an inner round peak 4, an inner bead seat 5, and an inner rim 6; based on the fact that the rim middle section 7 has a multi-segment structure, the rim is divided into three configurations, including a two-segment type, a three-segment type, and a four-segment type.

[0019] The sum of the widths of the outer bead seat 2 and the outer round peak 3 is F1, and the sum of the widths of the inner round peak 4 and the inner bead seat 5 is F2.

[0020] This invention provides a wheel axle 8 for a passenger car wheel rim, as shown in the figure. Figure 7 As shown. Example 1

[0021] In this embodiment, the middle section 7 of the rim is composed of two sections, as follows: Figure 2As shown, it includes a first segment and a second segment. The first segment is closely connected to the outer circular peak 3. Compared with the wheel axle 8, the radius of the first segment gradually shrinks and reaches the minimum radius point. The second segment connects the first segment and the inner circular peak 4. Compared with the wheel axle 8, the radius gradually expands.

[0022] The connection between the first and second sections of the rim section 7 is the point of minimum radius. The radius gradually expands at both ends of the minimum radius, exhibiting bidirectional draft characteristics. The angle between the first section and the horizontal direction clockwise is θ1, where θ1 = 14.39° and satisfies 0° < θ1 < 90°; the angle between the first and second sections is θ2, where θ2 = 118.15° and satisfies θ2 ≠ 180°; the angle between the second section and the horizontal direction counterclockwise is θ3, where θ3 = 47.56° and satisfies 0° < θ3 ≤ 90°; the three angles satisfy θ1 + θ2 + θ3 = 180°.

[0023] In this embodiment, the corresponding wheel size is 21×9J, that is, the wheel rim width is 228.5mm.

[0024] The widths of the first segment and the second segment are A1 and A2, respectively. F1=34.7mm, A1=122.45mm, A2=41.97mm, F2=29.38mm, which satisfies F1+A1+A2+F2=228.5mm. Example 2

[0025] In this embodiment, the middle section 7 of the rim is composed of three sections, as follows: Figure 3 As shown, the rim includes a first segment, a second segment, and a third segment. The first segment is immediately connected to the outer circular peak 3, and its radius gradually decreases relative to the wheel axle 8. The second segment connects the first and third segments, and its radius gradually increases relative to the wheel axle 8. The third segment connects the second segment to the inner circular peak 4, and its radius gradually increases relative to the wheel axle 8. The junction of the first and second segments in the middle section of the rim is the point with the smallest radius, and the radius gradually expands at both ends of the point with the smallest radius, exhibiting bidirectional draft characteristics. The angle between the first segment and the horizontal direction clockwise is α1, α1 = 14.29° and satisfies 0° ≤ α1 < 90°; the angle between the first segment and the second segment is α2, α2 = 148.05° and satisfies α2 ≠ 180°; the angle between the second segment and segment B3 is α3, α3 = 121.81° and satisfies α3 ≠ 180°; the angle between the third segment and the horizontal direction counterclockwise is α4, α4 = 75.85° and satisfies 0° ≤ α4 ≤ 90°. The four angles satisfy α1 + α2 + α3 + α4 = 360°.

[0026] In this embodiment, the corresponding wheel size is 21×9J, which means the wheel rim width is 228.5mm. The widths of the first, second, and third segments are B1, B2, and B3, respectively.

[0027] F1=34.7mm, B1=122.81mm, B2=32.65mm, B3=8.96mm, F2=29.38mm, satisfying F1+A1+A2+F2=228.5mm. Example 3

[0028] In this embodiment, the middle section 7 of the rim is composed of four sections, such as... Figure 4 As shown, the rim includes a first segment, a second segment, a third segment, and a fourth segment. The first segment is immediately connected to the outer circular peak 3, and its radius gradually decreases compared to the wheel axle 8. The second segment connects the first and third segments, and its radius gradually decreases compared to the wheel axle 8. The third segment connects the second and fourth segments, and its radius gradually increases compared to the wheel axle 8. The fourth segment connects the third segment and the inner circular peak 4, and its radius gradually increases compared to the wheel axle 8. The junction of the second and third segments of the rim middle section 7 is the point with the smallest radius, and the radii at both ends of the smallest radius gradually expand, exhibiting bidirectional draft characteristics. The angle between the first segment and the horizontal direction clockwise is β1, β1 = 13° and satisfies 0° ≤ β1 < 90°; the angle between the second and third segments is β2, β2 = 177° and satisfies β2 ≠ 180°; the angle between the second and third segments is β3, β3 = 149.34° and satisfies β3 ≠ 180°; the angle between the third and fourth segments is β4, β4 = 123.81° and satisfies β4 ≠ 180°; the angle between the fourth segment and the horizontal direction counterclockwise is β5, β5 = 76.85° and satisfies 0° ≤ β5 ≤ 90°. The five angles satisfy β1 + β2 + β3 + β4 + β5 = 540°.

[0029] In this embodiment, the corresponding wheel size is 21×9J, that is, the wheel rim width is 228.5mm. The lengths of the first segment, the second segment, the third segment, and the fourth segment are C1, C2, C3, and C4, respectively.

[0030] F1=34.7mm, C1=32.8mm, C2=90.86mm, C3=32.82mm, C4=7.94mm, F2=29.38mm, satisfying F1+C1+C2+C3+C4+F2=228.5mm. Example 4

[0031] The difference between this comparative example and embodiments 1, 2, and 3 above is that the rim structure of the comparative example includes an outer rim 1, an outer bead seat 2, an outer bead 3, a rim middle section 7, an inner bead 4, an inner bead seat 5, and an inner rim 6. The rim middle section 7 is composed of three segments, as follows: Figure 5As shown, the rim includes a first segment, a second segment, and a third segment. The first segment is immediately connected to the outer circular peak 3, and its radius remains constant relative to the wheel axle 8. The second segment connects the first and third segments, and its radius gradually expands relative to the wheel axle 8. The third segment connects the second segment and the inner circular peak 4, and its radius gradually expands relative to the wheel axle 8. The entire rim's middle section 7 exhibits a unidirectional expansion trend in radius relative to the wheel axle 8, demonstrating unidirectional draft characteristics. The first segment is parallel to the horizontal direction; the second segment forms a clockwise angle of γ1 with the horizontal direction, where γ1 = 1.26°; and the third segment forms a counterclockwise angle of γ2 with the horizontal direction, where γ2 = 47.56°.

[0032] In this comparative example, the corresponding wheel size is 21×9J, which means the wheel rim width is 228.5mm.

[0033] The lengths of the first, second, and third segments are labeled D1, D2, and D3, respectively. F1 = 34.7 mm, D1 = 37.65 mm, D2 = 118.83 mm, D3 = 7.94 mm, and F2 = 29.38 mm, satisfying F1 + D1 + D2 + D3 + F2 = 228.5 mm. Example 5

[0034] The difference between this embodiment and embodiments 1, 2, and 3 above is that the comparative rim structure includes an outer rim 1, an outer bead seat 2, an outer bead 3, a rim middle section 7, an inner bead 4, an inner bead seat 5, and an inner rim 6. The rim middle section 7 is composed of two segments, as shown below. Figure 6 As shown, the rim includes a first segment and a second segment. The first segment, E1, is immediately connected to the outer circular peak 3, and its radius remains constant relative to the wheel axle 8. The second segment, E2, connects segment E1 to the inner circular peak 4, and its radius gradually expands relative to the wheel axle 8. The entire rim's middle section 7 exhibits a unidirectional expansion trend in radius relative to the wheel axle 8, demonstrating unidirectional draft characteristics. Segment E1 is parallel to the horizontal direction, and segment E2 forms a counterclockwise angle of φ1 with the horizontal direction, where φ1 = 5.19°.

[0035] In this comparative example, the corresponding wheel size is 21×9J, which means the wheel rim width is 228.5mm.

[0036] The lengths of the first and second segments are E1 and E2, respectively. F1=34.7mm, E1=37.65mm, E2=126.77mm, F2=29.38mm, which satisfies F1+E1+E2+F2=228.5mm.

[0037] In all the embodiments and comparative examples above, the rims are paired with spokes of the same size and weight to form passenger car wheels. For all embodiments and comparative examples, first-order free modal tests and inner rim radial impact tests were conducted, and the weight of the wheels in each embodiment and comparative example was measured, generating the results shown in Table 1 below. As can be seen from the results in Table 1, when the spoke structure is exactly the same, the wheels of the three configurations provided by this invention have a significantly lower weight than the comparative example wheels, a substantial improvement in the first-order rim free modality, and a significant decrease in the radial impact deformation of the inner rim.

[0038] weight / Kg 15.773 16.426 16.090 17.095 16.971 Mode / Hz 311 345 333 227 218 Deformation amount / mm 4.121 3.792 3.883 5.142 5.311 Table 1: Test results of wheel weight, modal analysis, and inner flange deformation in Examples 1, 2, 3 and Comparative Examples 1 and 2 As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A passenger car wheel rim, characterized in that, It includes an outer rim, an outer bead seat, an outer round peak, a rim middle section, an inner round peak, an inner bead seat, and an inner rim, connected in sequence; the rim middle section is a two-section, three-section, or four-section type, and the radius of the two ends of the rim middle section gradually expands at the point of minimum radius; When the middle section of the rim is a two-section type, it includes a first section and a second section. The outer circular peak, the first section, the second section and the inner circular peak are connected in sequence, and the connection point between the first section and the second section is the point with the smallest radius. When the middle section of the rim is three-section, it includes a first section, a second section, and a third section. The outer circular peak, the first section, the second section, the third section, and the inner circular peak are connected in sequence, and the connection between the first section and the second section is the point with the smallest radius. When the middle section of the rim is four-segment, it includes a first segment, a second segment, a third segment, and a fourth segment. The outer circular peak, the first segment, the second segment, the third segment, the fourth segment, and the inner circular peak are connected in sequence, and the connection between the second segment and the third segment is the point with the smallest radius.

2. A passenger car wheel rim as described in claim 1, characterized in that, When the middle section of the rim is two-segmented, the angle between the first segment and the horizontal direction clockwise is θ1, 0°<θ1<90°; the angle between the first segment and the second segment is θ2, θ2≠180°; the angle between the second segment and the horizontal direction counterclockwise is θ3, 0°<θ3≤90°; θ1+θ2+θ3=180°.

3. A passenger car wheel rim as described in claim 2, characterized in that, θ1=14.39°, θ2=118.15°, θ3=47.56°.

4. A passenger car wheel rim as described in claim 1, characterized in that, When the middle section of the rim is three-segmented, the angle between the first segment and the horizontal direction clockwise is α1, 0°≤α1<90°; the angle between the first segment and the second segment is α2, α2≠180°; the angle between the second segment and the third segment is α3, α3≠180°; the angle between the third segment and the horizontal direction counterclockwise is α4, 0°≤α4≤90°; α1+α2+α3+α4=360°.

5. A passenger car wheel rim as described in claim 4, characterized in that, α1=14.29°，α2=148.05°，α3=121.81°，α4=75.85°。 6. A passenger car wheel rim as described in claim 1, characterized in that, When the middle section of the rim is four-segment, the angle between the first segment and the horizontal direction clockwise is β1, 0°≤β1<90°; the angle between the second and third segments is β2, β2≠180°; the angle between the second and third segments is β3, β3≠180°; the angle between the third and fourth segments is β4, β4≠180°; the angle between the fourth segment and the horizontal direction counterclockwise is β5, 0°≤β5≤90°, and β1+β2+β3+β4+β5=540°.

7. A passenger car wheel rim as described in claim 6, characterized in that, β1=13°，β2=177°，β3=149.34°，β4=123.81°，β5=76.85°。

Images